While Denver is one of the best winter destinations in the U.S. mostly due to its proximity to the Rockies ... high drive along the Guanella Pass Scenic Byway might just be the ultimate autumnal ...

A unique backcountry byway in the remote Idaho mountains offers ... credited with "discovering" the Lemhi Pass route over the Rockies, but the Shoshone and Nez Perce tribes used the route for ...